Mechanism for drawing heads



(No Model'.) 3 Sheets-Sheet 1..

A. FALLS. EVENING MECHANISM FOR DRAWING HEADS.

No.- 500,120. Patented June 27, 13893.

lllllJb INVENTOR WSW WITNESSES THE mmms PEYERS co.. marauwoq WASHINGTON n. c.

(No Model.) 3' Sheets-Sheet 2.

A. FALLS. EVENING MECHANISM FOR DRAWING HEADS. No. 500,120. Patented June 27, .1893.

WITNESSES INVENTOR m2 Moms versus 001. PNOTDUTNIL. WASHINGTON. n c.

' M l.) 3 SheetsSheet 3.

A. FALLS.

EVENING MECHANISM FOR DRAWING HEADS.

No. 500,120. Patented June 27, 1893.

m I R F9 65 in a i m 5 a 5 2? E -f WITNESSES @SYSZENTORI HE uomns FEVERS ca, PHOYD-L|TNO.. WASHINGTON u c UNITED STATES PATENT Orrrcn.

ALONZO FALLS, OF LOWELL, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO ALEXANDER G. OUMNOCK, OF SAME PLAOE.

EVENING MECHANISM FOR DRAWING-HEADS.

SPECIFICATION forming part of Letters Patent No. 500,120, dated June 27, 1893.

Application filed February 6, 1893. Serial No. 461,087. (No model.)

To all whom it may concern.-

Be it known that I, ALONZO FALLS, a citizen of the United States, residing at Lowell, in the I ment in evening mechanisms for drawing heads, which shall be simple and compact in construction, durable, and reliable in operation.

My invention consists in certain novel features of construction and combinations of parts, all as fully set forth hereinafter, and

first will be described with reference to the accompanying drawings, and then will be particularly pointed out and clearly defined in the claims at the close of this specification which form a part hereof.

2:; Figure 1 of the accompanying drawings is a view in side elevation of part of a drawing head with my invention applied thereto, enough of the drawing head being shown to make clear the relations and operation of my' improved devices. Fig. 2 is a view of the same in elevation from the right in Fig. 1. Fig. 3 is a View of the variable speed devices, showing them in vertical central section on the line 33 of Fig. 1. Fig. 4 is a view in rear 5 elevation of the yoke. Fig. 4 is a view in end elevation of the yoke. Fig. 5 is a view thereof in vertical section on line 5-5 of Fig. 4. Fig. 6 is a face View of one of the measuring rods. Fig. 7 is a view thereof in side elevation. Fig. 8 is a view thereof in horizontal section on theline 88 in Fig.7. Fig. 9 is an enlarged view in plan representing the gearing by which the drawing rolls are connected with one another.

- 5 At 70 is shown the table of adrawing head,

the lower front roll F receiving around the same the driving band whereby the said roll is rotated when the band is on the fast pulley.

At F is the gearing serving to transmit motion to rolls M and 12 from roll 15, the latter being driven as will be explained hereinafter. a

At 76 is shown a stand for supporting the calender rolls, the latter being marked 19, 19. At 193, 193 are shown the gears whereby the said calender rolls are caused to rotate in unison.

At 191 is shown a spur gear on the rear calender roll. 6 5

At I is shown a large gear meshing with the gear 191 and also with the gear F on the' lower front roll F and thereby serving for the transmission of movement from roll F to the calender rolls, and at 302 is shown the trumpet whereby the sliver issuing from between the front rolls is condensed and guided between the calender rolls.

All of the foregoing parts are or may be substantially as usual in drawing heads.

The roll 15 is provided with driving connections embracing variable-speed devices which are combined with controlling or governing devices that are acted upon by the material passing through the machine, the said controlling or governing devices operating to occasion an increase in the speed of rotation of the rolls 15, M and 12 when the slivers average too small or too thin, and the supply of material reaching the rear rolls becomes deficient, and to occasion a decrease in the speed of rotation of the said rolls 15, M and 12 when the slivers average too large or thick and the supply of material reaching the rear rolls becomes too great.

The variable-speed devices which I prefer to employ, and the preferred connections of such devices with roll 15, are such as those which are shown in the drawings. In the latter, the outer end of the lower roll 15 is 5 supported by a stand 7 81 and carries a bevel gear 152 meshing with a bevel gear 131 on a spintlte 13, supported in an upright position by astand 75 and stepped in a bearing formed in a transversely placed horizontal stud 73 I00 which is supported in stands 7 4, 7 4 depending from table 70, the said bearing having a cover 731. The spindle 13 has placed thereon a sleeve 53 provided with a spline 531 fitted to a longitudinal groove 132 formed in the spindle, the said sleeve having affixed thereon a disk or wheel 532 with its periphery faced with leather or other suitable frictional material 5321. Two bevel gear wheels 14, 14 are mounted on the stud 73 with capacity to turn. freely thereon, the said wheels being located on opposite sides of the spindle 13 and having their inner sides faced with leather or other suitable frictional material 141, 141. The disk or wheel 532 occupies a position between these gear wheels 14, 14, with the'fric-* tional material 5321 on its periphery in con-- tact with the frictional material 141 covering the inner sides of the said wheels 14, 14. One of the said wheels 14, 14,,,is pressed against the periphery of the disk-or wheel 532 by a spiral spring 54 which surroundsjthe hub. of the said wheel 14 and takes bearing at one end against the wheel and at the other end," against the adjacent stand 74. The other' wheel 14 .may be similarly pressed if desired. The teeth of both of the wheels 14 mesh with,

. the teeth of an intermediately placed bevel gear 182 mounted on a suitably driven shat'ti 18, which in the drawings is shown placed in an inclined position and provided at its upper end with a bevel gear 181 that meshes, with a bevel gear 192 on the rear calender roll 19. Thereby the said wheels 14,14 are driven in opposite directions to each 0ther,i but at the same rate of speed. By the con-j tact of the frictional material 5321 onthe; periphery'of disk or, wheel 532 with tthe fric-l tional material 141 on the sides of wheels 14,? 14, movement of rotation is communicated; to spindle 1-3, and such movement is transmitted to rolls 15, M and 12 through the de-,

scribed connections.

The governing or controlling devices connect with the sleeve 53 by means of a loose; collar 21 which is mounted on the exterior of I the sleeve between fixed collars 533, 534 on the sleeve,'the said collar 21 havingtrun-i nions 211 that enter slots inthe arms of the fork provided on one end of a lever-114. The; said lever is moved on its pivot 1141 ,by the, governing or controlling devices, and carries with it the sleeve, moving the latter length-l wiseof. the spindle 13 so as to slide .thediskf or wheel 532 nearer to the axis of rotation of the wheels 14, 14 and reduce the speed trans-j mitted through spindle 13 and the described:

connections to the rolls 15, M and ,12, or far-' ther from the said axis so as to'increase the said speed. As the said wheels 14, 14, are turned in opposite directions at a fixed rate of speed by the driving connections described above, they communicate by frictional con tact to the disk or wheel 532, rotation ata ratej of speed which is proportional tothe distance from' their axis of rotation at which the said disk or wheel bears againsttheir inner sidesj The governing or controlling devices which movethelever 114 as the material passing to the rolls varies in amount are asfollows: At 71is a stand secured to table at a slight distance tothe rear of the position of the rear roll 12. The cross'piece at the top of this stand has a succession-of rounded crests 711,

711 formed thereon at slight distances apart, and over this series of crests is extended a ley 10 is journaledto-a lug extending laterally from a-yoke 72 that is held to stand 71 by rivets 712, or screws. A series of so-called measuring rods 20, 20 is sustained in aposiition closely adjacentto-the rear roll.12. The feet of these rods rest upon theutop'of the steel ribbon 50 at points intermediate the.

crests 711, 711 of the stand'Zl, the lower ends of the said rods being placed betweenbars 7 21, 721 east upon the yoke 72, one of such bars standing on each, side of .the series oflrods.

Atzthe ends'of.

'The said lower ends are spaced apart and held in proper position over thespaces in termediate the crests 711, 711,byprojections 202, 202,. vcast on their opposite edges. the series of rods these, projections contact with the interior vertical faces of. the stand, :hut intermediate. such faces .the projections of adjacent rods contact with one another.

The heads 20, 20 of the rods have vertical slots ing thereto, and through these passages and slots passtherespective slivers on: theirway tothe rolls. The distancefrom the bight of the rear rolls ,to the slots ,1 n the measuring rods is made less than the length of the staple .203, 203.withtaperingpassages 204,204 leadof the slivers, preferably, in orderthat the.

slivers may not become pulled apart or drawn out. The yoke hasits'top bar formed witha depending lip or flange 722 againstwhich rest the forward sides of the.upper ends of the measuring rods as they are drawn forward: by the friction of the moving slivers. .On the said flange are provided guides 7 23,723, which enterthe slots 203 in the upper ends of the rods 20. In the drawings each measuring. rod is formed on the forward side .thereof with a projection extending beneath'the-fiange 722, the uppersurface of the said projection forming-substantially a continuation of the curved bottom of t the slot 4 in the rod. When .the slivers, are passing throughthe passagesuand vslots'in the measuring rods, and under the flange 7 22,,the bulk of the cross-section of each sliver depresses .the corresponding measnri n g rod so as to cause the foot thereof to bendthe steel ribbon down into the space betweenadjacent crests71l, 711. Asthe ribbon iSrlhllS bent by the rods theilever 114 is drawn upon so as to hold the disk or wheel 532 in a position between the wheels 14,,14 which is de-' pendent upon the extent to which the ribbon is drawn upon in "consequence of being bent. The parts are proportioned and arranged, as

will be understood, so as that so long as slivers of the desired given bulk continue to pass to the-rolls, the rear rolls 15, M and 12 will be driven at a predetermined rate of speed. It will be obvious that when an increase takes place in one or more of the slivers so as to occasion an increase in the average bul k thereof, the corresponding rod or rods will be depressed to a greater extent by the increased volume of material passing through theirslots and passages, thereby taking up more of the ribbon and drawing upon the lever 11% so as to shift the disk or wheel 532 inwardly between the wheels 14, 14, that is toward the axis of rotation of the latter, and causing a proportionate reduction in the s eed of the rolls 15, M and 12. When a decrease in one or more of the slivers takes place so as to decrease the average bulk of the slivers the corresponding rod or rods will be permitted to rise or yield to the upward pressure of the ribbon, and the latter will be permitted to straighten somewhat and enable the disk or wheel 532 to be moved outwardly from the axis of rotation of wheels 14:, 14, by the action of the spring 1142, thereby causing. a proportionate increase in the speed of the rolls 15, M and 12.

By preference those parts of the governing or controlling devices which contact with the material passing through the machine are placed as shown in the drawings so as that the said material must meet and pass such parts before entering between the drawing rolls. It is advantageous thus to place the evening devices on the back instead of the front of the drawing head as formerly usual. Formerly, in most instances the trumpet through which the sliver passes on its way from the drawing rolls to the calender rolls was taken as the instrumentality for operating the evening mechanism. The sliver pass ing from the drawing rolls through the trumpet moves at about six times as high a rate of speed as it does at the 'point where it enters the drawing rolls, any uneveness in the sliver has an opporturnity to pass before the evening devices have an opportunity to prevent it, and the sliver is drawn down to such an extent that a comparatively great diiference in it must exist before the evener will work. By locating the devices which contact with the material in such position as that the latter must meet and pass the same before it enters between the rolls, the different parts of the evening mechanism are afiorded opportunity to perform their office before the uneven part of the material has passed the drawing rollers, this result being facilitated by the slower travel of the material at this point in the machine.

I claim as my invention- 1. The combination with the rolls of a drawing-head, and roll-actuating mechanism embracing variable speed devices, of governing or controlling devices comprising a flexible band or ribbon connected with such variable speed devices, and operating the latter by being itself drawn upon in the direction of its length in consequeuceof being flexed'and' a movable sliver guide acting upon the band or ribbon to occasion a flexnre thereof proportionate to the size of the sliver and operating thereby to determine the speed transmitted to the rolls, substantially as described.

2. The combination with the rolls of a drawing-head, and roll-actuating mechanism enlbracing variable speed devices, of governing or controlling devices comprising a flexible band or ribbon connected with such variable speed devices, and operating the latter by being itself drawn upon in the direction of its length in consequence of being flexed and a series of movable pieces separately acted upon by'individual slivers and acting upon the band or ribbon to produce flexures therein and operating thereby to determine the speed transmitted to the rolls, substantially as. described.

3. The combination, with the variable speed devices, of governing or controlling devices comprising a flexible band or. ribbon connected with such variable speed devices, a stand having a series of crests over which said band or ribbon extends, and a series of movable pieces separately acted upon by individual slivers and acting upon the band or ribbon at points intermediate the said crests,

substantially as described.

4. The combination, with thevariable speed devices, of governing or controlling devices comprising a flexible band or ribbon connected with such variable speed devices, a stand having a series of crests over which said band or-ribbon extends, a yoke having a depending flange, and a series of movable pieces separately actedupon by individual slivers and having surfaces between which and the said flange the said slivers are compressed, the said pieces acting upon the band or ribbon at points intermediate the said crests, substantially as described.

5. The combination, with variable speed devices, of governing or controlling devices com prising a flexible band or ribbon connected with such variable speed devices, and operating the latter by being itself drawn upon in the direction of its length in consequence of being flexed and a series of movable pieces serving as guides for individual slivers and acting upon the band or ribbon as changes occur in the sizes of the slivers to determine the speed transmitted, substantially as described.

6. The combination, with variable speed de vices, of governing or controlling devices comprising a flexible band or ribbon connected with such variable-speed devices, a stand having a series of crests over which said band or ribbon is passed, a yoke having a depending flange, and a series of movable pieces serving as guides for individual slivers and having surfaces between which and the said flange the slivers are compressed, the said pieces acting upon the band or ribbon at pointsintermediate the saidcrests, substantially as described.

7. The combination, with the rolls of a drawing head, and roll actuating mechanism embracing variable speed devices comprising a pair of driving wheels, means for rotating them at the same rate of speed but in opposite directions, an intermediate driven disk or Wheel in frictional contact with the said Wheels,aspind1e in operative connection with the rolls, and on which said disk or wheel is splined, and a lever operatively connected with said disk or wheel for moving it on said spindle, of governing or controlling devices 

